package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.webSocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
//    @Transactional(rollbackFor = Exception.class)//所有的异常发生都会进行事务回滚
//    @Transactional//发生错误时可以进行事务回滚,默认下只会在运行时异常(RunTimeException)执行事务回滚
    @Transactional(propagation = Propagation.REQUIRES_NEW)
    //Propagation.REQUIRED 默认值需要事务，有则加入，无则创建新事务,Propagation.REQUIRES_NEW需要新事务，无论有无，都会创建新事务。为常用两个
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1. 处理各种业务异常（地址簿为空、购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){//抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //检查用户的收货地址是否超出配送范围
        //checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());
        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if(shoppingCartList == null || shoppingCartList.size() == 0){//抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);

        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setAddress(addressBook.getDetail());
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList = new ArrayList<>();
        //订单明细表插入多条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);
        //用户下单完成，清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO的返回数据
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
        public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //通过websocket向客户端推送消息， type orderId content
        Map map = new HashMap();
        map.put("type",1);//1 表示来单提示，2表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号："+outTradeNo);
        String jsonString = JSON.toJSONString(map);//转换成json字符串
        webSocketServer.sendToAllClient(jsonString);
        }

    /**
     *  用户端订单分页查询
     * @param pageNum
     * @param pageSize
     * @param status 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @return
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO dto = new OrdersPageQueryDTO();
        dto.setUserId(BaseContext.getCurrentId());
        dto.setStatus(status);
        //分页查询
        Page<Orders> page = orderMapper.pageQuery(dto);
        //封装数据
        List<OrderVO> orderVOList = new ArrayList<>();
        if (page!=null &&page.size()>0){
            for (Orders order : page) {
                //查看订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(order.getId());
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order,orderVO);//将order内的属性传递给orderVO
                orderVO.setOrderDetailList(orderDetails);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     *  查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO getOrders(Long id) {
        Orders orders = orderMapper.findById(id);
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cancelOrders(Long id) throws Exception {
        //查询订单
        Orders orders1 = orderMapper.findById(id);
        //校验订单是否存在
        if (orders1==null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orders1.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(orders1.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (orders1.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders1.getNumber(), //商户订单号
                    orders1.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
        }

    /**
     * 再来一单就是将原订单中的商品重新加入到购物车中
     * @param id
     */
    @Override
    public void repetion(Long id) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
        //将订单详情转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");//封装时id不要赋值
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        int pageNum = ordersPageQueryDTO.getPage();
        int pageSize = ordersPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum,pageSize);
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVoList = getOrderVoList(page);
        return new PageResult(page.getTotal(),orderVoList);
    }

    /**
     * 2待接单 3已接单 4派送中
     * @return
     */
    @Override
    public OrderStatisticsVO getStatistics() {
        OrderStatisticsVO os = new OrderStatisticsVO();
        //根据用户id查询所有的订单
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        os.setToBeConfirmed(toBeConfirmed);
        os.setConfirmed(confirmed);
        os.setDeliveryInProgress(deliveryInProgress);
        return os;
    }

    private List<OrderVO> getOrderVoList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orederVoList = new ArrayList();
        List<Orders> ordersList = page.getResult();
        //判断是否不为空
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orederVoList.add(orderVO);
            }
        }
        return orederVoList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
        if (CollectionUtils.isEmpty(orderDetails)){
            throw new OrderBusinessException("没有这个订单详情");
        }
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3;）
        List<String> orderDishes = orderDetails.stream().map(o -> {
            String orderDish = o.getName() + "*" + o.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        /// 将该订单对应的所有菜品信息拼接在一起
        StringBuilder sb = new StringBuilder();
        for (String orderDish : orderDishes) {
            sb.append(orderDish);
        }
//        String.join("",orderDishes);
        return sb.toString();
    }
}

